MADISON, Wis. (AP) — President Donald Trump filed a lawsuit Tuesday in Wisconsin seeking to disqualify more than 221,000 ballots in the state’s two most Democratic counties, a longshot attempt to overturn Joe Biden’s win in a battleground state he lost by nearly 20,700 votes.

Trump filed the day after Democratic Gov. Tony Evers and the chairwoman of the Wisconsin Elections Commission certified Biden as the winner of the state’s 10 Electoral College votes. Trump asked the Wisconsin Supreme Court to take the case directly, rather than have it start in a lower court, and order Evers to withdraw the certification.

The Wisconsin Supreme Court gave Evers until 8:30 p.m. Tuesday to respond to the lawsuit, an unusually tight deadline that speaks to how quickly the court is likely to decide the case.

The state’s highest court, controlled 4-3 by conservatives, also is considering whether to hear two other lawsuits filed by conservatives seeking to invalidate ballots cast during the presidential election. Separately, two Wisconsin Republicans filed a new federal lawsuit Tuesday that mirrors some of Trump’s claims and asks a judge to declare him the winner in Wisconsin.

Trump’s lawsuit repeats many claims he made during a recount of votes in Milwaukee and Dane counties that large swaths of absentee votes were illegally cast. Local officials rejected his claims during the recount, and Trump is challenging procedures that have been in place for years and never been found to be illegal.

Trump is not challenging any ballots cast in conservative counties he won.

Biden campaign spokesman Nate Evans called the lawsuit “completely baseless and not rooted in facts on the ground.” Democratic Gov. Tony Evers said it was “without merit.”

Wisconsin Attorney General Josh Kaul, a Democrat, noted that the lawsuit doesn’t allege that anyone was ineligible to vote, but instead seeks to create a two-tiered election system where voters in Dane and Milwaukee counties are disenfranchised “under much stricter rules than citizens in the rest of the state.”

Trump’s Wisconsin attorney, Jim Troupis, said in a statement that voters “deserve election processes with uniform enforcement of the law, plain and simple.”